I have a pritty strange problem with the Shadow client. I started a torrent download 3 days ago and it all worked fine (although I'm behind a Linux Firewall and had a yellow status). But as I wanted to start a new download (Stargate 7x22), I only got this error message: Problem connecting to tracker - unspecified error

I thought my firewall was messing up, but even after fixing it (the other download has a green status), I don't get any connection. In fact none of the new downloads it try to start work. What the hell is the problem? Can I only have one client open, or what???

Unless the tracker server specified in the metafile is working you won't be able to connect to other peers. A torrent can coast for quite a while with a bad tracker, but if you disconnect then you won't be able to reconnect. You can try letting it run, it will automatically retry, but there are no guarantees.

I have two Downloads working in the same time. The one I started two days ago works perfectly well. Every other I wanted to start today (even if the first download is not ongoing = the client is closed) doesn't get connected to the server (which work just fine believing the stats on the sites).

I too am having this problem, seems like it started about the same time that 3.4 was breifly released, all my downloads started to go very slow. Used to get 500k DLs now i bearly get 1k up and down....

Can you see the torrent metadata (view it in torrentspy).
If you can see if the torrent has got an "announce-list" section with nothing in it.
If it has, this is causing the problem.
I have a small program that can delete this erroneous section if needed...